July 9 will be one of the shortest days ever, as Earth is spinning faster and scientists are still working to understand why.

Atomic clocks — among the most precise instruments humans have ever built — have been keeping track of Earth’s spin since the ...

Earth is spinning faster, making July 9, 2025, one of the shortest day since 1960 by 1.3 to 1.6 milliseconds, primarily due to the Moon's alignment. While imperceptible in daily life, this speedup may ...

The rotation tends to shift by a few milliseconds over time as Earth's spin is influenced by natural forces such as earthquakes and ocean currents. The fastest recorded day in history so far was July ...